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MAX16818 Datasheet(PDF) 7 Page - Maxim Integrated Products |
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MAX16818 Datasheet(HTML) 7 Page - Maxim Integrated Products |
7 / 25 page PIN NAME FUNCTION 1 PGND Power-Supply Ground 2, 7 N.C. No Connection. Not internally connected. 3 DL Low-Side Gate-Driver Output 4 BST Boost Flying Capacitor Connection. Reservoir capacitor connection for the high-side MOSFET driver supply. Connect a ceramic capacitor between BST and LX. 5 LX Source Connection for the High-Side MOSFET 6 DH High-Side Gate-Driver Output. Drives the gate of the high-side MOSFET. 8, 22, 25 SGND Signal Ground. Ground connection for the internal control circuitry. Connect SGND and PGND together at one point near the IC. 9 CLKOUT Oscillator Output. Rising edge of CLKOUT is phase-shifted from the rising edge of DH by 180°. 10 PGOOD Power-Good Output 11 EN Output Enable. Drive high or leave unconnected for normal operation. Drive low to shut down the power drivers. EN has an internal 15µA pullup current. Connect a capacitor from EN to SGND to program the hiccup-mode duty cycle. 12 RT/SYNC Switching-Frequency Programming and Chip-Enable Input. Connect a resistor from RT/SYNC to SGND to set the internal oscillator frequency. Drive RT/SYNC to synchronize the switching frequency with external clock. 13 V_IOUT Voltage Source Output Proportional to the Inductor Current. The voltage at V_IOUT = 135 x ILED x RS. 14 LIM Current-Limit Setting Input. Connect a resistor from LIM to SGND to set the hiccup current-limit threshold. Connect a capacitor from LIM to SGND to ignore short output overcurrent pulses. 15 OVI Overvoltage Protection. Connect OVI to DIFF. When OVI exceeds 12.7% above the programmed output voltage, DH is latched low and DL is latched high. Toggle EN or recycle the input power to reset the latch. 16 CLP Current-Error Amplifier Output. Compensate the current loop by connecting an RC network to ground. 17 EAOUT Voltage-Error Amplifier Output. Connect to the external compensation network. 18 EAN Voltage-Error Amplifier Inverting Input 19 DIFF Differential Remote-Sense Amplifier Output. DIFF is the output of a precision unity-gain amplifier whose inputs are SENSE+ and SENSE-. 20 CSN Current-Sense Differential Amplifier Negative Input. The differential voltage between CSN and CSP is amplified internally by the current-sense amplifier (gain = 34.5) to measure the inductor current. www.maximintegrated.com Maxim Integrated │ 7 MAX16818 1.5MHz, 30A High-Efficiency, LED Driver with Rapid LED Current Pulsing Pin Description |
Similar Part No. - MAX16818_15 |
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Similar Description - MAX16818_15 |
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